oxford discover 2 unit 3 how things work

water is a ........

• liquid

• solid

we put .......... in drinks to make them cold.

• gas

• ice

on a hot day, ice cream can ......

• melt

• freeze

we can't hold a ....... in our hands.

• solid

• gas

we......... cold water to make it hot.

• freeze

• heat

water in a river can ........ over stones.

• melt

• flow

a book is a .......... .

• gas

• solid

you can see ........... on very hot water.

• steam

• ice

on a very cold day water can .............

• freeze

• melt